I just got my pair on Thursday and after trying different size plugs the entire day, I could only get a good seal with the largest plugs. The isolation is very good, cant hear hardly anything thats going on around me... but most importantly- the sound... these are... horrible. Any low bass in my music sounds VERY weak and in some cases is barely audible. The only thing i can say is the mid/higher freq's dont seem to strain as i turn the volume up. The comfort is alright but i find it odd that I need the largest ear plugs to get a seal. On my set of Sennheiser CX300s I'm just using the set of typical medium round plugs that came on them out of the box with no problems. The doubles flange seem to be too long and won't seal.
I've been constantly trying to move these things around in my ears to get them to sound good but it's turning out to be impossible. The sound is always very thin and almost somewhat airy. If I push them any further into my ear, the sound dissappears. Surely I must have a decent seal if I can't hear anything around me, right?
Another weird thing about these - they sound worse on my Pioneer receiver's headphone out than they do on my Zen Vision:M. All of my other phone's seem to be the opposite. They get overly bright and the bass still isn't there. The music I'm listening to is typically Nine Inch Nails, Tool, Radiohead - other rock of sorts with a little bit of Aphex Twin or daft punk every now and again... Any sort of bass boost or EQ adjustments just make the issues much more apparent and worse.
This has been a very frustrating experience... not to mention buyer's remorse is kicking in hardcore [:@]
I also gotta ask, what is up with that hiss when they are plugged in and nothing is playing? I mean, It's not too big of a deal but a little strange...
Got any tips on what the lack of bass is? Everything I read is it's all about the seal - which I apparently have... Surely I've gotta be doing something wrong...